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Docta Complutense
Article . 1988
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Investigaciones paleomagnéticas en la Zona Subbética

Authors: Osete López, María Luisa; Freeman, R.; Vegas Martínez, Ramón;

Investigaciones paleomagnéticas en la Zona Subbética

Abstract

Se ha realizado un estudio palomagnético en la parte central dc la Zona Subbética, en rocas volcánicas (pillow-lavas, material intrusivo y coladas de basaltos) y sedimentarias (calizas, margocalizas y calizas nodulosas de facies Ammonitico Rosso) de edad jurásica. Con objeto dc analizar las propiedades magnéticas de las rocas estudiadas se han determinado las curvas termomagnéticas dc los materiales volcánicos y sc han realizado experimentos sobre adquisición gradual dc remanencia magnética isoterma y de desimanación de dos componentes isotermas ortogonales con las rocas sedimentarias. A pesar dc que el comportamiento magnético ha sido diferente en cada una de las litologías investigadas, en la mayoría de los casos ha sido posible aislar una componente magnética estable durante los procesos de lavado magnético. Los resultados obtenidos han sido comparados con las direcciones esperadas para Iberia estable y se ha observado una importante discrepancia en el valor de la declinación magnética. La desviación hacia el Este de la paleodeclinación encontrada en esta área indica que se han producido rotaciones horarias en la Zona Subbética.

Este estudio ha sido subvencionado por la CAICYT (Proyecto núm. 2121-83) y por el ETH (Institut für Geophysik) de Zürich. Publicación núm. 301 del Departamento de Física de la Tierra (Geofísica).

Peer reviewed

Country
Spain
Related Organizations
Keywords

Geodinámica, España, Jurásico, 2507 Geofísica, Paleomagnetismo, Zona Subbética

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